We don't have time for this.
We don't got time for this.
1) Are these the same?
2) Is the second acceptable and natural?
3) Is the second more American than British?
We don't have time for this.
We don't got time for this.
1) Are these the same? Yes
2) Is the second acceptable and natural?t No. It's sub-standard English.
3) Is the second more American than British? I don't know.
Clive
anonymous3) Is the second more American than British?
Yes, according to the Google Ngram Viewer.
CJ